Melting and clarifying method suitable for ultrahigh aluminum cover plate glass and transparent microcrystalline glass

Abstract

The invention discloses a melting and clarifying method suitable for ultrahigh aluminum cover plate glass and transparent glass ceramics, which comprises the following steps of: arranging 4-8 rows of tin oxide electrodes on a tank wall and / or a tank bottom in a range of 30-60% from a rear wall of a tank furnace, wherein the distance between two adjacent rows of tin oxide electrodes is 300mm-600mm; a strontium sulfate clarifying agent is added into an ultrahigh aluminum cover plate glass or transparent microcrystalline glass batch, and the adding amount of the strontium sulfate clarifying agent is 0.2%-1.0% of the mass of the batch. According to the invention, the tin oxide electrode is matched with the strontium sulfate clarifying agent, so that the clarifying effect of the ultrahigh aluminum cover plate protective glass and the transparent microcrystalline glass can be optimal; through system application and verification, the number of bubbles of the ultrahigh aluminum cover plate protective glass and the transparent microcrystalline glass can be stably controlled to be (4-8) per 10 kg of glass, and the high-quality melting and clarifying target of the ultrahigh aluminum cover plate protective glass and the transparent microcrystalline glass is effectively achieved.

Description

technical field [0001] The invention relates to the technical field of glass melting and clarification, in particular to a melting and clarification method suitable for ultra-high aluminum cover glass and transparent glass-ceramics. Background technique [0002] After 2007, smart phones and tablet computers began to emerge in large numbers, which led to the vigorous development of capacitive touch screens. In order to enhance the scratch resistance of the touch screen surface and reduce the drop damage of smart phones and tablet computers, a chemical Enhanced ultra-thin alkali-aluminosilicate glass has quickly become the new favorite of glass, which has attracted widespread attention of global glass technology workers and manufacturers and industrial production and application. [0003] Chemically enhanced ultra-thin alkali-aluminosilicate glass is mainly used for screen protection and is used on the surface of the display screen. It is commonly known as cover glass and alka...

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Problems solved by technology

[0010] In order to promote the clarification of refractory glass, many institutions have proposed the use of composite clarifiers, mixing different types of clarifiers, such as oxidized, volatile, and decomposed types, to play a role in the low-temperature, medium-temperature, and high-temperature stages of glass batch melting. For example, sodium chloride, sulfate (calcium sulfate), variable price oxides (cerium oxide and tin oxide), and zinc oxide are used in combination, and the ratio of use is (0.15~0.35): (0.1~3.0): (0.1~ 0.5): (1~3), the amount added is 2%~4.5% of the mass of molten glass, such a relatively complex clarifier solution is used for ultra-high aluminum cover plate protection glass and transparent glass-ceramics, and its clarification effect is found It is not ideal, and it cannot meet the optical quality requirements of the ultra-high aluminum cover cover glass and transparent glass-ceramic

[0011] At present, the above-mentioned problems have been basically solved in the manufacture of low-aluminum cover glass, medium-aluminum cover glass, and high-alumina cover glass at home and abroad, but the melting of ultra-high aluminum cover glass and transparent glass-ceramic Clarification of the problem failed to achieve a good breakthrough

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